package thread;

/**
 * 常见的并发安全API
 * StringBuilder与StringBuffer
 *
 * StringBuilder不是并发安全的，多线程场景下不能使用，此时应当换做使用
 * StringBuffer
 */
public class SyncDemo4 {
    public static void main(String[] args) {
        StringBuilder sb = new StringBuilder();
//        StringBuffer sb = new StringBuffer();
        Thread t1 = new Thread(){
            public void run(){
                for(int i = 0; i < 1000; i++){
                    sb.append("abc");
                }
            }
        };
        Thread t2 = new Thread(){
            public void run(){
                for(int i = 0; i < 1000; i++){
                    sb.append("def");
                }
            }
        };
        t1.start();
        t2.start();
        try {
            Thread.sleep(50);
        } catch (InterruptedException e) {
        }
        System.out.println(sb.length());//6000?
        System.out.println(sb);
    }
}




